Tube holder



Patented Mar. 26, 1940 i A l UNITED STATES PATENT OFFICE TUBE HOLDER Manlio Manetti, Milan, Italy, assigner to Fabrica Italiana Magneti Marelli Soc. An., Milan, Italy, a corporation of Italy Application May 31, 1939, Serial No. .276,747 In Italy June 3, 1938 3 Claims. (Cl. 248-358) This invention relates to holders for electron edge of the tube holding disk 8 is provided, are discharge tubes to be mounted on supports or interconnected by regions having a transverse chassis of electric' apparatus as radioreceiver, sectional area as far as possible reduced in orsets; and comprises a resilient holder by means der to restrict to a maximum possible extent the of which the jolts and vibrations which may act conveyance of vibrations from thev supporting 5 on the said support or chassis are prevented from parts I, 3 to the disk 8 and tube 5, 6; further reaching the tubes mounted thereon, the soshallow interstices are left intermediate said supcalled microphonic effect being thus avoided in port-engaging portions and 4tube. carrying porthe tube operation, tion'to allow for small-range deflections of the l0 The holder according Vto this invention for disk 8 with respect to supporting parts I, 3 while 10 mounting tubes on chassis. or supports of radiorestricting such exceedingly large respective receivers and equivalent apparatus comprises a movements of said disk and parts as could affect rubber pad which is conveniently shaped to prothe safety of the vmounting of the tube on the/ vide regions having a restricted transverse secchassis intended to carry it.

tion in order to minimize the transmission of More particularly the pad I provides two opl5 vibrations through the pad body said pad further posite peripheral flanges 1 which abut on the `acting to confine within defined ranges the perchassis plate I and on the collar 3, and an ln- -missible respective movements of the tube and termediate C-shaped body which provides an ilichassis with respect to each other; further means ternal groove I'I in which the edge of the disk are provided for connecting the holder sockets 8 engages; said flanges I are connected with 20 and the tube base pins with cooperating outer the body 'I" by means of annular Webs .1 and circuits in conditions to prevent the vibrations said body 'I" has an outer diameter smaller than which may operate on the wires leading to other the outer size of the flanges 1 and consequently parts of the apparatus from reaching the tube. than the internal diameter of the collar 3 where An embodiment of the present invention is the pad I is located. 25 illustrated by way of example on the annexed Due to the described arrangement, gaps I2 are drawing and provided intermediate the flanges 'I' and the body Fig. 1 is an enlarged transverse section of the 1" and intermediate the body 1" and the collar tube holder of this invention with portions of 3, said gaps permitting for minor respective disthe support or chassis on which it is mounted placements of the body l and chassis parts I, 3 30 and of the tube engaged in said holder; Fig. 2' While movements beyond a certain amplitude is a top plan view of the resilient pad embodied cause the body l" to engage directly the ilanges in the holder of this invention. f 1 the respective movements -of the tube and In the illustrated embodiment, I denotes a chassis being thus damped and confined within j portion of a plate pertaining to the chassis of a narrowv ranges. 35 radioreceiver, in which an aperture l Vis pro- To provide for the connection of the'tube base vided for reception of the base 5 of the tube 6; a pins Il with the cooperating circuits outside of collar 3 of rigid insulating material is fast on said tube the sockets 9 are provided with fingers the bottom of the` plate I in registerwith said I3 located in register with fingers I4 fast on and 40 aperture I to enclose and engage the tubeholder extending from the insulating collar 3; the regis- 40 and itsI resilient pad as hereinafter described; tering fingers I3 and I 4 are connected by means A resilient pad'I made of rubber is located of very light Wire spirals I5 aliixed to said iinwithin the collar 3; as hereinafter dscribed in gers and further wires I6 leading to other parts detail, said pad 1 provides bottom and vtop'abutof the set are amxed on the stationary fingers 4'5 ting faces which engage the top face of the col- Il. The stresses the Wires I6 may impart to the 45' vlar 3 and the bottom face of the plate I opposite fingers I l are taken up by said fingers and posto each other, and also a groove in which the Asibly by thedeformations of the spirals I5 and edge of a rigid tube holding disk 8 made oi' incannot be imparted to sockets 9 and consequently l'sulatingmaterial is engaged, this disk carrying to the tube mounted in the holder.

in holes therein the conducting sockets 8 in What I claim as `my invention and desire' to 50 which the pins II extending from the tube base secure by Unitbd States Letters Patent is: 5 engage. v 1. A vholderfor mounting an electron dis- Conveniently the portions of the pad which ch'arge tube on a chassis comprising a resilient engage the plate I and the collar 3 and the porring-shaped pad including spaced coextensive tion thereof in which the. groove entered by the ilanges adapted for engagement with said chassis 55 tube on a' chassis comprising a riiient ringshaped pad including spaced coextensive danges adapted for engagement with said chassis and-an `annular' internally grooved body located intermediate said danges and webs connecting said body and danges, gaps being provided intermediatesaidbodyandeachotsaiddangesin register with said` respective interconnecting webs, a tube support engaged in said annular amano and en annuler may ieeeted intermediate seid bodygrooveandmeansonsaidtubempporttor engaginxsaidtubethereon.

'3.Aholderformotmtinganelectrondischarge tubeonachassiscompringaresilimtintegrai ring-shaped pad including spaced coextensive danses andanannular internallygroovedbody located intermediate saiddanges and thin crosssection webs connecting said body and danses, acollarfastonsaidchasaistoprovideanannular space where said pad is enclosed with said danges l0 abuttingonsaidchassisandcollargapsbeina provided intermediate said danses and body in register with said webs and intermediate said bodyandcollanatubesupportengagedinsaid annular body-groove and means on said tube il support for engaging said tube thereon.

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